Here is the full list of all 23 Freedom Fall achievements.
Get cog, time and death par for all levels
Get over cog par for every level
Get the solo ending.
Pass the game without dying.
Get under the death par for every level
Get the dragon ending.
Get under time par for every level
Complete game without buying any equipment
Complete the not-guilty path in level 11.
Kill the shark boss.
Get the princess ending.
Complete the game.
Complete the game on Hard mode
Complete the guilty path in level 11.
Complete Chainmoor
Beat the princess in a race section.
Escape the shark boss.
Kill yourself with a bomb.
Pass a level without dying.
Complete Bombard
Buy all the equippable items in the shop.
Collect 50 large gears.
Enter a no-boys-allowed zone.